Since the 1980s,a warming and weting trend in arid Central Asia(ACA)has been widely reported.However,no consistent knowledge has been presented about whether warming and weting trends are evenly distributed throughout...Since the 1980s,a warming and weting trend in arid Central Asia(ACA)has been widely reported.However,no consistent knowledge has been presented about whether warming and weting trends are evenly distributed throughout ACA or whether there are noticeable topographical differences.We combined the ERA5-Land reanalysis dataset and data from Google Earth Engine to analyze the topographic differences of ACA from 1981 to 2020.The findings indicate that significant(p<0.05)warming has a broader geographic scale in ACA and that warming rate of low-elevation landforms(high plains and hlls)is higher than that of high-elevation landforms(mountains and tablelands).However,the weting trend does not fllow this patern.By contrast,high-elevation landforms have a higher wetting rate than low-elevation landforms and are the main areas of wetting.Additionaly,low-elevation landforms continue to maintain the warming and drying trends.Notably,the wetting trend of high-elevation landforms is amplified with altitude.Meanwhile,the wetting trend is negatively related to the warming trend(p<0.01)across the entire elevation range.Collectively,the findings provide new insights into the current research hotspot of warming-wetting"trend in ACA and highlight the differences in the responses of different landforms to climate change.展开更多
基金supported by the National Natural Science Foundation of China(42071i02).
文摘Since the 1980s,a warming and weting trend in arid Central Asia(ACA)has been widely reported.However,no consistent knowledge has been presented about whether warming and weting trends are evenly distributed throughout ACA or whether there are noticeable topographical differences.We combined the ERA5-Land reanalysis dataset and data from Google Earth Engine to analyze the topographic differences of ACA from 1981 to 2020.The findings indicate that significant(p<0.05)warming has a broader geographic scale in ACA and that warming rate of low-elevation landforms(high plains and hlls)is higher than that of high-elevation landforms(mountains and tablelands).However,the weting trend does not fllow this patern.By contrast,high-elevation landforms have a higher wetting rate than low-elevation landforms and are the main areas of wetting.Additionaly,low-elevation landforms continue to maintain the warming and drying trends.Notably,the wetting trend of high-elevation landforms is amplified with altitude.Meanwhile,the wetting trend is negatively related to the warming trend(p<0.01)across the entire elevation range.Collectively,the findings provide new insights into the current research hotspot of warming-wetting"trend in ACA and highlight the differences in the responses of different landforms to climate change.
